Carbureter.



G'. S. PIERSON. GAEBURETER. APPLIGATION FILED NOV. 9, 1909. RENEWED JULY 2a, 1913.

Lemma,

Patented Sept. 9, 1913. I

rrnn s'rnrns Parana carries- GEORGE s. PIERSON, or 'KALAMAZOO, micnreeit.

M-EBUBETER.

Specification of Letters Patent.

Patented Sept. e, isle.

Application filed November 9, 1909, Serial No. 527,062. Renewed July 28, 1913. Serial 1i0 '781,-6tl7.

and in some respects, an improvement upon the structure of my Patent No. 898,920,

' dated Sept. 15, 1908.

The main ob]ects of this invention are: First, to provide in a carburetor an improved means for controlling the relative proportions of air and fuel. ISECOIld, to provide in a carburetor an improved means by which air and the fuel control members are simultaneously operated." Third, to provide in a carburetor an improved structure which is very simple and not likelyto get out of repair in use. o

Further objects, and objects relating to structural details will definitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification.

The structure described constitutes one effective embodiment of my invention. Other embodiments would be readily devised by those skilled in the art.

'The invention is clearly defined and pointed out in the claims.

A structure constituting an effective and preferred embodiment of'the features of my invention is clearly illustrated inthe accompanying drawing, forming a part of this specification, in which:

Figure 1 is a vertical section through a structure embodying the features of my inmodified construct1onsg l1ig. 5 is a plan view of the structure show n in Fig. 4, the parts of the body or frame being broken away. Fig. 6 is a detail horizontal section, through the mixing chamber, showing the mixing chamber valves completely open. Fig. 7 is a corresponding view showing the mixing chamber valves partially closed. Fig. 8 is an enlarged detail vertical section, showing details of the fuel control valve. Fig. 9 is a detail vertical section of a modified form of the fuel control valve.

In the drawings, the sectional views are taken looking in the direction of the little arrows at the ends of the sectionlines, and similar reference numerals refer to similar parts throughout the several views.

Referring to the drawing, the mixing chamber 1 is preferably passage-like in form, and is provided with an inlet passage 2 and a discharge passage 8, the discharge passage being adapted to be connected to an explosion engine cylinder.

The body 4 is preferably a casting having the mixing chamber and passages formed therein. Depending from and opening into the mixing chamber 1 is a well 5 through which the fuel is fed to the mixing chamber. This well depends into the liquid reservoir 6, which is connected to a suitable source of' float 9 to which the valve is connected. The

details of this valve, and its connection to the float, form no part of the present invention, as they are fully disclosed in my patent before referred to. i

The reservoir, 6 is connected to the feed well 5 by a passage 10. The fuel delivery is controlled by the valve or member 11 which depends into the well. This valve is provided with "an air passage 12. discharging into the well. The discharge openings 18 for the passage 12 are arranged to deliver above the seat engaging portion of the valve 11, the discharge openings 13 being preferably latel ally in Fig. 8. The air isdelivered through the passage 12 into the well, and thence into the mixing chamber, independently of the air inlet passage 2 of the mixing chamber.

I preferably provide the mixing chamber with an inlet' valve 14 and discharge valve 15. These valves are in the structure illustrated, formed integrally with the valve member 16, which, in the structure shown in Fig. l, is threaded into the body at of the mixing chamber to be rotated and thus operate the valves 14; andv 15 simultaneously.

disposed, as clearly appears The valves let and 15 and the valve member lhe valves 14 and 15 are preferably so arranged that the delivery passage, or discharge opening, of the mixlng chamber is restricted relative to its inlet opening. This secures a better suction of air through the fuel valve passage than would be the case were the inlet and asperating openingsof the same capacity. The valve 11 is preferably threaded through the valve operating member 16 to be adjusted therein, a. lock nut 18 being provided for securing the valve in its adjusted position. I preferably provide an index for the fuel valve. By thus arranging the parts, the inlet and discharge valvs of the mixing chamber are simultaneously operated, as is also the fuel valve. The air inlet valve is preferably cut off at one ed e, as shown in Figs. 6 and 7, so that when t. e valves are partially open, the discharge is somewhat restricted relative to the inlet, as clearly appears from the diagrammatic illustration of Fig. 7. \Vhen the valves are fully open, as in Fig. 6, there is no such restriction, but it is found that ordinarily the carburetor is operative with the valves partially closed.

In the modified structure shown in Fig. f, the valve operating member is not threaded into the body or frame of the carburetor, but is rotatably mounted therein and held yieldingly in position by means of the spring member 20. The fuel control valve is threaded through the member 16, so that, as the member is operated to control the air valves, the fuel valve is operated. A lever 21 is provided for operating the member 16. This may be connected to be operated through any desired connections.

To take up the slack in the threads I preferably provide the structure shown in Figs. 1 and 2 with springs 23 which are arranged to engage the valve member 16. The fuel control member in the embodiment shown in Fig. i is prevented from turning as the member 16 is adjusted by the spring 2 2 which engages the finger piece 22. The finger piece 22 for the valve 11 is preferably provided with an index fo indicating the adjustment of the fuel valve. In the modified structure shown in Fig. 9 the fuel control valve or member is of the form shown in my patent hereinbefore referred to.

In my improved carburetor, I am enabled to very accurately control the proportions of fuel and air and thus maintain a very proper proportion of mixture. The parts are economical to construct and assemble. The valves are, in the structure illustrated, all directly mounted on the operating member, air valves being formed integrally there l A: tail in the form in which I have embodied them in practice 1 am, however, aware that they are capable of considerable variaive-illustrated my improvements in detion in structural details without departing from my invention, and I desire to be understood as claiming the same specifically as well as broadly.

Having thus described by invention, what I claim as new and desire to secure by Letters Patent is z -1. In a carburetor, the combination with the body having a mixing chamber therein; a fuel feed well opening into said mixing chamber; a movable valve member; avalve for said mixin chamber carried by said member; and a fuel control valve having an air supply passagetherein adapted to deliver air to said well independently of said mixing chamber, said fuel valve being threaded into said valve member.

2. In a carburetor, the combination with the body having a mixing chamber therein; a fuel feed well opening into said mixing chamber;-a movable valvemember; a valve for said mixing chamber carried by said member; and a fuel control valve having an air supply passage therein adapted to deliver air to said well independently of said mix ing chamber, said fuel valve being adjustaoly mounted on said valve member.

3 In a carburetor, the combination of a mixing chamber; a fuel feed well opening into said mixing chamber; a valve for said mixing chamber; and a fuel control valve having an air supply passage therein adapted to deliver air to said well independently of said mixing chamber, the discharge of said passage in said valve being above the scat engaging portion thereof, said fuel valve being operatively connected to said mixing chamber valve.

at. In a carburetor, the combination. of a mixing chamber; a fuel feed well opening into said mixing chamber; a valve for said mixing chamber; and a fuel control valve having an air supply passage therein adapted to deliver air to .said well independently of said mixingchamber, said fuel valve being operatively connected. to said mixing chamber valve.

In a carburetor, the combination of a mixing chamber; a fuel feed well opening into said mixing chamber; a valve operating member; inlet and discharge valves for said mixing chamber carried bysaid member whereby they are simultaneously operated, the discharge valve being arranged so that the discharge of said mixing chamber is restricted relativeto its inlet; and an air delivery member having an air passage therein adapted to deliverto said feed well imlependently of said mixing chamber, said air delivery member being adjustably ar ranged in said valve operating member.

6. In a carburetor, the combination of a mixing chamber; a fuel feed well opening into said mixing chamber; a valve operatmg member; inlet and discharge valves for said mixing chamber carried by said mem ber having an air supply passage therein adapted to deliver tOS'dld Well independ ently of said mixing'chambers', carried by said valve operating ,"uember, all coacting as specified:

7. In a carbureter, tlle'coinbination of a mixing chamber; a fuel feed well opening into said mixing chambeir; a valve for said mixing chamber; and a member having an air supply passage-therein adapted to deliver to said well lndeper ently ofsaidmixing chamber, said member being operatively connected to said mixing chamber valve and adjustably associated therewith.

8. In a carbureter, the cpmbination of. a

mixing chamber; a ffuel feed well opening into said mixing chamber; a valvefor said mixing chamber; and amember having an air supply passage therein adapted to deliver to mg cl witnesses.

said Well independently of said mixiamber, said member being operatively connected 'to said valve for said mixing Chamber. .1 I v 9. In a carbnreter, the combination with the mixing chamber; a fuel feed well opening into said mixing chamber; a fuel con- Y trol valve having an air passage therein discharging into said we] independently of said mixing chamber; inlet and discharge valves for said mixing passage; and a common member for operating said valves whereby they are said fuel valve being operatively connected to said member and being adjustably associated therewith.

-. In witness whereof, I have hereunto set my hand and seal in the presence of two GEORGE s.

PIERSON. a 8.

simultaneously operated, 

